fix: test case ut_lind_fs_pwrite_to_chardev_file

[ChinmayShringi]

Description

Fixes # (issue)

This pull request introduces a new test case (ut_lind_fs_pwrite_to_chardev_file) that validates writing to a character device type file (/dev/null). The test simulates writing 100 bytes to /dev/null, which in a real system, discards any data written to it. This test ensures that the pwrite_syscall behaves as expected when interacting with a character device file.

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

• cargo test ut_lind_fs_pwrite_to_chardev_file

Checklist:

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• Any dependent changes have been added to a pull request and/or merged in other modules (native-client, lind-glibc, lind-project)